"Check for updates" is just not working. I use a 6.1 build, and told Joel that it produced a server error message. I think Joel has fixed that error (in the 6.1 builds), but he has not yet published the build with the error corrected.
6.0.8.2273 is in any case the most recent stable release; 'check for updates' should produce the answer that there are none.
That said, thanks for posting your result; there has clearly been a misunderstanding between limey and myself; I thought he was having a problem installing, but if it is just the 'check for updates' issue, my advice is not to reinstall but to leave things as they are until Joel fixes the problem.
David